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Dual TBX10A Installation and Owner’s Manual



Dual TBX10A 


About DUAL
DUAL is one of the biggest worldwide underwriting companies in the world as well as one of the biggest international cover holders at Lloyd’s. DUAL is backed by some of the biggest and most well-regarded insurance and reinsurance businesses in the world. With underwriting offices all over the world, we are determined to develop and offer the right solutions for the right customers in order to satisfy their needs. To do this, we link capacity providers with new markets, intermediaries with capacity providers, and brokers with their clients.

DUAL is a subsidiary of Howden Group Holdings, a global insurance company that places a strong emphasis on employee ownership. Howden Group Holdings was established in 1994, operates in 45 territories, and has a workforce of about 10,500.


Getting Started

Thank you for purchasing the Dual TBX10A 10″ ported enclosure with a built-in amplifier. Although Dual has attempted to ensure the information in this manual is accurate, please be aware that any part of it is subject to change without notice. Please read the entire manual before installation. Due to the technical nature of amplifiers, it is highly recommended that your Dual TBX10A is installed by a professional installer or an authorized dealer.

Before You Start

  • Always disconnect the negative battery terminal. Consult a qualified technician for instructions if you are unsure.
  • Avoid installing the amplifier where it would be subject to high temperatures, such as from direct sunlight, or where it would be subject to dust, dirt or excessive vibration.
  • Use extreme caution when drilling holes to avoid damaging fuel lines or existing vehicle wiring.
  • All amplifier installations require power, signal, and speaker wires (not included).
  • An amplifier installation kit (sold separately) is highly recommended to facilitate the installation. Consult your dealer for recommendations.

Mounting Location

  • Choose a mounting location for the TBX10A. Suggested locations include behind a seat or in the trunk.
  • For optimum performance, make sure to provide at least 1″ of space around all sides of the amplifier.
  • Do not mount the TBX10A under carpets or where airflow is restricted.
  • Do not install the TBX10A where it may be exposed to moisture.
  • The optimum mounting location varies between vehicles. Remember to test all amplifier functions before completing the final mounting procedure.


The following instructions are designed to ensure safety during the installation and  use of the TBX10A. Failure to heed these instructions can result in injury or damage  to the unit or vehicle.

The following installation instructions are intended to be used as a basic guideline. If you feel unsure about installing this speaker system yourself, Dual recommends acquiring the services of a professional car audio installation center.

Before installation, please review the following guidelines:

  1. Be sure to carefully read and understand the instructions before attempting to install this product.
  2. If additional wiring is required, we recommend running all wires prior to mounting your enclosure in place.
  3. To ensure reliable performance and minimize signal or power loss, use the highest quality connectors available.
  4. Never run speaker wires underneath your vehicle. Running speaker wires inside the vehicle provides the best protection from exhaust, heat and environmental elements.
  5. Avoid running wires over, near or through sharp-edged surfaces. We suggest you also use rubber grommets to protect any wires routed through metal, especially the firewall.
  6. When running the speaker cable to the amplifier, avoid running it near sources of high current (i.e. wiring harnesses, battery cables). 

Connection Descriptions 

Be sure to follow specific instructions included with your amplifier  installation kit (not included with this amplifier). The information below should be  used a general guideline only. 

Power Wire (+12V) 

  • Disconnect the negative battery terminal before proceeding. Consult a qualified technician for instructions if you are unsure.
  • Plan wire routing before cutting any wires to length. Begin by routing the power +12V wire from the battery to the amplifier location. Use a grommet when running wires through the firewall or metal openings. Avoid running the power wire near existing vehicle wiring to prevent induced noise from entering the audio system.
  • Use extreme caution when drilling holes to avoid damaging fuel lines or existing vehicle wiring.
  • The +12V wire MUST be fused within 18″ of the battery for the protection of the vehicle’s electrical system.

Ground Wire (GND)

  • The amplifier ground wire should be as short as possible. Choose a clean unpainted section of metal or the vehicle chassis when attaching the ground connection. Be sure to clean the area of any dirt or grease.

Remote Turn-on Wire (REM)

  • The remote turn-on wire connects to the head unit’s amplifier turn-on lead or other switched 12-volt source.

Input Signal 

  • The amplifier’s input signal connects to the receiver’s low-level (RCA) or high-level (speaker wire) outputs.


  • Never run any wires underneath or outside the vehicle. 

Connections and Controls 

Dual TBX10A FIG-1

  1. Phase Control
  2. Power Indicator
  3. Protect Indicator
  4. Input Level Control
  5. Crossover Frequency
  6. Bass EQ
  7. Fuse (15A)
  8. Power / Input Connector

Typical Wire Routing 

Dual TBX10A FIG-2

High-Level Input (Speaker Wire)

Dual TBX10A FIG-3

High-level inputs should only be used when RCA  outputs are not available from the head unit. Connect the head unit speaker outputs to the high-level input connector as shown below. The black wire (signal reference ground) may or may not require a connection to the chassis ground – depending on your particular installation. Do not use both low and high-level inputs at  the same time. Connect only one or the other.  

Main Power Connections
Connect BAT+, GND and REM wires accordingly. A suitable fuse MUST be installed on the BAT+ lead within 18″ of the battery for the protection of the vehicle’s electrical system. 

Fuse Rating
When replacing the fuse, make sure new fuse is the correct type and amperage. Using an incorrect fuse could damage the amplifier. The TBX10A uses (1) 15 amp ATO style fuse.

Power/Ground Wire Size
For optimum performance, use only 12 gauge wire or larger. Make sure to use the same size of power and ground wire. 


Dual TBX10A FIG-4

Control Setup and Adjustment 

Input Signal Connections Low Level (RCA)
Low level (RCA) input signal is preferred for best performance. Typical trunk-mount installations require a 17-20 foot RCA cable. Most trucks and behind-seat applications require a 6-12 foot RCA cable. Using twisted pair construction RCA cables will minimize noise.
Crossover Frequency Control
The adjustable crossover is used to filter out frequencies above 50Hz ~ 250Hz. Adjust it to where the TBX10A sound output blends with the rest of the sound system.
Phase Control
The phase control compensates for delay between the TBX10A output and the rest of the sound system. Begin with the phase control set to 0 degrees. If the sound is adequate from the normal listening position inside the vehicle, no further adjustment is necessary. If the sound is thin or lacking bass, adjust the phase control until the bass is full and punchy.
Input Level Control
The input level control (LEVEL) is used to obtain the best possible match between the head unit audio output and the amplifier input. Begin by turning the input level control fully counterclockwise. Next, turn up the head unit volume control around 3/4 of the way up. Adjust the input level control clockwise until audible distortion is heard, then slightly counterclockwise to provide the best match.
LED Indicator
The LED indicator illuminates green during normal operation.


Limited One-Year Warranty 

This warranty gives you specific legal rights. You may also have other rights which vary from state to state. Dual Electronics Corp. warrants this product to the original purchaser to be free from defects in material and workmanship for a period of one year from the date of the original purchase.
Dual Electronics Corp. agrees, at our option, during the warranty period, to repair any defect in material or workmanship or to furnish an equal new, renewed or comparable product (whichever is deemed necessary) in exchange without charges, subject to verification of the defect or malfunction and proof of the date of purchase. Subsequent replacement products are warranted for the balance of the original warranty period.

Who is covered? This warranty is extended to the original retail purchaser for products purchased from an authorized Dual dealer and used in the U.S.A.

What is covered? This warranty covers all defects in material and workmanship in this product. The following are not covered: software, installation/removal costs, damage resulting from accident, misuse, abuse, neglect, product modification, improper installation, incorrect line voltage, unauthorized repair or failure to follow instructions supplied with the product, or damage occurring during return shipment of the product. Specific license conditions and copyright notices for the software can be found via www.dualav.com

What to do? 

  1. Before you call for service, check the troubleshooting guide in your owner’s manual. A slight adjustment of any custom controls may save you a service call.
  2. If you require service during the warranty period, you must carefully pack the product (preferably in the original package) and ship it by prepaid transportation with a copy of the original receipt from the retailer to an authorized service center.
  3. Please describe your problem in writing and include your name, a return UPS shipping address (P.O. Box not acceptable), and a daytime phone number with your shipment.
  4. For more information and for the location of the nearest authorized service center please contact us by one of the following methods:


Exclusion of Certain Damages:
This warranty is exclusive and in lieu of any and all other warranties, expressed or implied, including without limitation the implied warranties of merchantability and fitness for a particular purpose and any obligation, liability, right, claim or remedy in contract or tort, whether or not arising from the company’s negligence, actual or imputed. No person or representative is authorized to assume for the company any other liability in connection with the sale of this product. In no event shall the company be liable for indirect, incidental or consequential damages. 


Dual TBX10A FIG-5


Dual TBX10A FIG-6


Dual Electronics Corp.
Toll-Free: 1-866-382-5476
Monday-Friday, 9AM-5PM EST
©2016 Dual Electronics Corp. All rights reserved.
Printed in China 

FAQs for Dual TBX10A Installation and Owner’s Manual

What is the wattage of a dual tbx10a?

Speaker wire and RCA inputs: Easily connect to virtually any car stereo. 300 Watts maximum power.

The twin 10-inch sub is good, right?

Surprisingly effective Dual did a fantastic job tuning this enclosure even if the wood used to create it appears to be of low quality. Although the box feels almost too light to reverberate nicely, the sub itself is quite solidly crafted. The front port, however, does a fantastic job with the sub’s performance.

Do dual subwoofers work well?

Dual subwoofers will significantly improve the system headroom that is available, resulting in a higher dynamic range, less output compression, less distortion, and a lesser risk of overdrive artifacts. Running duals will, in short, produce cleaner, more accurate bass at high drive settings.

Dual power amplifier: what is it?

The different amplifier blocks inside of a typical audio amplifier share the same power supply. The critical input stages and voltage gain stages of the audio amplifier share the same power supply as the amplifier output stage driving the loudspeaker.

What is the wattage of a good woofer?

Any subwoofer with a wattage between 150 and 500 is ideal for a fantastic music-listening experience and is inexpensive. Wireless or cable connectivity are both options for connecting a subwoofer. An audio source for a wired system would be speakers that are linked to it.

Dual subs should be the same, right?

To prevent the difference in features (phase, speed, frequency response, and output capability) from impacting the combined effect, the two subwoofers should be of the same brand and model.

What is the power of the dual 10-inch sub?

Dual 10-Inch 1200 Watt 2 Ohm Vented Loaded Subwoofer Enclosure, by Kicker, model number 44DCWC102.

The creator of dual audio?

Dual is a well-known supplier of audio and video goods, high-tech electronics, and digital solutions for use in automobiles, airplanes, ships, and homes and is a member of the Namsung America brand family.

Are two speakers preferable?

For the typical listener, stereo is far superior. It has a more expansive, intricate, and realistic sound. Mono is preferable than stereo in locations with several speakers, such as bars, cafes, and restaurants, where stereo may produce phase-cancellation problems.

Pdf – Dual TBX10A Installation and Owner’s Manual

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